Effects of temperature on the solid-surface luminescence properties of p-aminobenzoic acid adsorbed on sodium acetate
Solid-surface fluorescence and phosphorescence quantum yield values were obtained from +23 to -180/sup 0/C for the anion of p-aminobenzoic acid adsorbed on sodium acetate. Phosphorescence lifetime values were also acquired for the adsorbed anion from +23 to -196/sup 0/C. The fluorescence quantum yield values remained essentially constant as a function of temperature; however, the phosphorescence quantum yield values changed substantially with temperature. The phosphorescence lifetime experiments indicated two decaying components, and each component showed a gradual increase in phosphorescence lifetime and then appeared to level off at lower temperatures. The results support a rigidly held mechanism for the room-temperature phosphorescence of the anion of p-aminobenzoic acid adsorbed on sodium acetate.
- Research Organization:
- Univ. of Wyoming, Laramie
- DOE Contract Number:
- AC02-80ER10624; FG02-86ER13547
- OSTI ID:
- 7149553
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 59:3; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
ACETATES
ADSORPTION
ALKALI METAL COMPOUNDS
AMINO ACIDS
ANIONS
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
CHARGED PARTICLES
DATA
EFFICIENCY
EXPERIMENTAL DATA
FLUORESCENCE
INFORMATION
IONS
LIFETIME
LOW TEMPERATURE
LUMINESCENCE
MEDIUM TEMPERATURE
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
PABA
PHOSPHORESCENCE
QUANTUM EFFICIENCY
SODIUM COMPOUNDS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE